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Don't track kills in VNInfo. Use interval ends instead.

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The VNInfo.kills vector was almost unused except for all the code keeping it
updated. The few places using it were easily rewritten to check for interval
ends instead.

The two new methods LiveInterval::killedAt and killedInRange are replacements.

This brings us down to 3 independent data structures tracking kills.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106905 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jakob Stoklund Olesen
2010-06-25 22:53:05 +00:00
parent 13151432ed
commit 15a571436d
7 changed files with 96 additions and 257 deletions
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lib/CodeGen/StrongPHIElimination.cpp
-3
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@@ -830,9 +830,6 @@ void StrongPHIElimination::InsertCopies(MachineDomTreeNode* MDTN,
LiveInterval& Int = LI.getInterval(I->getOperand(i).getReg());
VNInfo* FirstVN = *Int.vni_begin();
FirstVN->setHasPHIKill(false);
if (I->getOperand(i).isKill())
FirstVN->addKill(LI.getInstructionIndex(I).getUseIndex());
LiveRange LR (LI.getMBBStartIdx(I->getParent()),
LI.getInstructionIndex(I).getUseIndex().getNextSlot(),
FirstVN);